What would be the best weight class for a 5'9-5'10"

[Prince Mongo]

Get in top condition, then get on a scale and the scale will tell you. You don't pick a weight class you simply get in the best shape you can be in!!
Height is an advantage when the short man doesn't know how to explote him. When the shorter man has the skills then the reach factor is reversed because most long armed fighters are at a disadvantage when the fight is fought at close range! Theres two reaches long & short both have their +s and -s!!!!! Ray

This is great advice. Get into great shape and what you are is what you should be. No point in arguing with your genetics,farting against thunder is pointless. Work your A$$ of and what will be will be.